Wiseup 4Ch Real-time H.264 HDD Mobile DVR HDMI Security Camera Recorder CCTV System H.264 Compression Format; 4 Channel Real-time Recording 4 Channel Audio Input; Support 4Ch Playback Simultaneously Support Vehicle Plate Number Overlay; Support 1x 2TB HDD in Max; Support 2 Way Audio 4Ch Alarm Input; Support USB Back-up 8-32V Wide Voltage Power Input; Housing with Lock